You may be interested in checking out the mapper of doom.* It doesn’t have the slick click and drag feature of Google maps/satellite imagery, but it does offer information overlays drawn from a number of public databases (including geourl and superfund site locations). It also has the ability to layer topo maps and/or vector data over satellite photos. It’s not so useful for finding directions, but it is a fun toy.

*[In the name of full disclosure, I should mention that this was developed by my brother.]